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net/ixgbe: fix Rx queue blocking issue

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In the IOV scenario, multi Rx queues can be assigned to one VF.
If the dropping is not enabled, when no descriptors are available
for one queue, this queue can block others.

Fixes: 00e30184da ("ixgbe: add PF support")
Cc: stable@dpdk.org

Suggested-by: Liang-Min Larry Wang <liang-min.wang@intel.com>
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
This commit is contained in:
Wenzhuo Lu 2017-02-22 10:59:35 +08:00 committed by Ferruh Yigit
parent 33b203ff96
commit 9941892b7a
1 changed files with 13 additions and 1 deletions
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14
drivers/net/ixgbe/ixgbe_pf.c
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@ -397,15 +397,27 @@ ixgbe_vf_reset_msg(struct rte_eth_dev *dev, uint16_t vf)
uint32_t reg_offset, vf_shift;
const uint8_t VFRE_SHIFT = 5; /* VFRE 32 bits per slot */
const uint8_t VFRE_MASK = (uint8_t)((1U << VFRE_SHIFT) - 1);
uint8_t nb_q_per_pool;
int i;
vf_shift = vf & VFRE_MASK;
reg_offset = (vf >> VFRE_SHIFT) > 0 ? 1 : 0;
/* enable transmit and receive for vf */
/* enable transmit for vf */
reg = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
reg |= (reg | (1 << vf_shift));
IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg);
/* enable all queue drop for IOV */
nb_q_per_pool = RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool;
for (i = vf * nb_q_per_pool; i < (vf + 1) * nb_q_per_pool; i++) {
IXGBE_WRITE_FLUSH(hw);
reg = IXGBE_QDE_ENABLE | IXGBE_QDE_WRITE;
reg |= i << IXGBE_QDE_IDX_SHIFT;
IXGBE_WRITE_REG(hw, IXGBE_QDE, reg);
}
/* enable receive for vf */
reg = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
reg |= (reg | (1 << vf_shift));
IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg);